Low-water alarm.



No. 745,987. PATENTED DEC. 8, 1903. J. ARRANGE.

LOW WATER ALARM.

APPLICATION FILED DBO. 19, 1902..

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Nrrnn -retres atented Deoember 8, 1903.

arreter @trienio JAMES ARRANGE, OF ALLEN TOWN PENNSYLVANIA.

SPECEFICATION formingpart Cf Lettersatent No. 745,987, dated December 8, 1903.

Application led December 19, 1902. Serial No. 135,930. (No model.)

To @ZZ whom t may concern:

Be known that l, .Linus ARRANCE, a oiti zen of the United States, residing at Allentown, in the county of Lehigh and State of Pennsylvania, have invented a new and useful Low-Water Alarm, of which the following is a specification.

My invention relates to low-water alarms for steam-boilers, and has for its objects to produce a device or" this character in which the construction is materially simplied, the alarm is sounded directly from the boiler, and the operation of the device to sound the alarm occurs immediately and without failure upon the Water in the boiler reaching the dangerpoint.

The invention consists in the details of construction more fully hereinafter pointed out.

ln the accompanying drawings, Figure 1 is a side elevation, partlyin section, of myimproved device, showing the valve closed. Fie. 2 is a similar` view with the valve open.

Referring to the drawings, 1 indicates a steam-boiler, and 2 a vertical chamber mounted and suitablysupported adjacent thereto. 1 preferably provide this chainberwith a removable cover 3, bolted securely thereon, and with a removable bottom 1, also secured by bolts.

5 is a water conduit or pipe connecting the boiler and chamber preferably a short distance below the low-water or danger line of the boiler. This conduit is adapted to conduct water from the boiler tothe chamber to control the movements of a iioat 6,1nounted in the chamber and adapted forvertical movement therein.

7 is a steam whistle or alarm preferably mounted above the chamber 2 and connected directly with the steam-boiler above the Water-line by a steam conduit or pipe 8.

9 is avalve-casing preferably cast directly onto the top of the chamber and suitably formed in its interior with a valve-seat 10. The steam-pipe S is coupled to one end of the valve-casing, while a short pipe 11, leading to the whistle, is coupled to its opposite end. The whole forms, in etfect, a continuous conduit connecting the whistle directly with the boiler, as above stated.

12 is avalve mounted in the valve-casing and connected to the top of float G, the movements of which cause it to close against or be retracted from the valve-seat 10 to control the admission of steam to the whistle. The valve is provided with a head 13, enlarged at its bottom to prevent its escape from the valve-casing and permitting it to sustain the Weight of the iioat when it drops. The valve-head is beveled at its top and projects upward through the valve-seat in such position that the steam will impinge upon the saine and assist in forcing the valve downward when the Water in the boiler falls to the danger-line.

14 and 15 are stop-cocks mounted, respectively, in the steam and water conduits for closing either or both at will.

16 is a valve-controlled discharge or drain pipe in the bottom of the chamber, and 17 is a similar pipe in the bottom of the float for discharging any water that might possibly enter the same. f

17 is a pipe which connects the chamber 2, near its upper end, with the boiler at a point above the water-line of the latter to insure equalization of the pressure in the chamber above and below the doat 6, as usual.

18 indicates au ordinary glass gage-tube which permits inspection from time to time of the state of the water within the chamber 2, this tube being partially surrounded by a metal protectingcasing 19.

1n operation, supposing the water in the boiler to be at a safe level, the ioat will be buoyed up by the water in the chamber and the parts will occupy the position shown in Fig. 1, with the valve closed. Should the Water in the boiler fall to the danger-line, which is, as indicated in the drawings, just belou7 the float, the oat will immediately drop to the water-level, retract the valve, and permit the steam t0 iow to the whistle and sound the alarm.

1t will be seen that in my device there is a direct connection between the boilerand whistle, through which the steam travels direct and not indirectly through an intermediate chamber, thus insuring the immediate and perfect operation of the device.

Having thus described myinventiomwhat l claim is- 1. rEhe combination with a steam-boiler, of a chamber situated adjacent thereto, a float mounted in the chamber, a Water-conduit leading from the boiler to the chamber and adapted to conduct water to the chamber to control the movement of the float, an alarm, a steam-conduit connecting the alarm directly with the boiler, a Valve-seat mounted in the steam-conduit, and a valve adapted to close upon the seat and having a vertically-disposed stem tapped directly into the upper end of the loat, said valve projecting through the seat in position to be impinged upon by the steam.

2. The combination with a steam-boiler, of a chamber situated adjacent thereto and having a removable cover, a valve-casing formed integral with the cover and provided with a Valveseat, a float located Within the chamber, a valve adapted to close upon the valveseat and project through the same and having a vertically-disposed stem Tapped at its lower end into the upper end of the iioat, a Waterconduit leading from the boiler to the chamber to conduct Water to the latter for operating the oat, a pipe tapped into the Valvecasing at one side of the Valve and having a Whistle associated therewith, and a steampipe tapped into the valve-casing at the other side of the valve and connected with the steam-boiler and adapted to conduct. steam directly from the boiler to the Whistle, said steam in its passage being adapted to impinge upon the Valve, whereby the movement of the float for opening the same will be assisted by the pressure of the steam on the valve.

In ltestimony that I claim the foregoing as my own l have hereto affixed my signature in the presence of two witnesses.

JAMES ARRANCE. Vitnesses:

MARTIN H. LEAMY, DAVID OCoNNoR. 

